Carbon paper pack for manifolding typewriters



J. C. DOYLE CARBON PAPER PACK FOR MANIFOLDING TYPEWRITERS Filed June 26, 1952 Dec. 29, 1953 2 Sheets-Shea? 2 INVENTOR. JSEPH CARROLL OYLE n ATTORNfK patented Dec. 29, 195.3

CARBON PAPER PACK FOR MANIFOLDING TYPEWRITERS Joseph Carroll Doyle, Rochester, N. Y., assgnor to Kee Lox Manufacturing Company, Rochester, N. Y., a corporation of New York Application June 26, 1952, Serial No. 295,681 V3 Claims. (Cl. 282-1) This invention relates to a manifolding typewriter carbon paper pack of the general type in which a series of carbon sheets forming parts of dierent packs are each connected to a separate supporting bar or blade of a movable carbon paper carriage, the several carbon sheets being interposed between continuous sheets of record paper on which typewritten impressions are made and the carbon paper carriage being withdrawn rearwardly after each typing operation to remove the carbon sheets from between the record sheets and permit tearing off the typewritten records from the continuous sheets, and the invention has for its purpose to afford an improved carbon paper pack which can be readily attached to a supporting bar of a carbon paper carriage and which includes a multiplicity of superposed independently outwardly folded sheets of carbon paper arranged so that the carbon surfaces of the sheets face outwardly and the outermost carbon sheet can be easily withdrawn from the pack and unfolded for use between two record sheets while the reserve folded carbon sheets are maintained in their superposed folded relationship in the pack and effectively protected whereby the operators lingers do not come in contact with the exposed carbon surface and the carbon sheets are protected from engagement with the record sheets during movement of the carbon paper carnage.

A carbon paper pack of this general type, as disclosed in application Serial No. 211,353, led February 16, 1951, now Patent No. 2,631,868 in which a wrapper surrounds the carbon sheets, has proved superior to earlier carbon paper packs but presents an objection in the respect that when the wrapper is formed from paper of sunicient weight and thickness to properly retain the carbon pack on the supporting bar, the pack is excessively bulky and thick, and when the wrapper is made from paper of the required weight and thinness to reduce bulk, it readily tears and the wrapper when attached to the supporting bar does not maintain the carbon pack with sufficient rmness to prevent sidewise swinging movement of the pack in relation to the Wrapper, particularly when pulling out a fresh carbon sheet for use, and it is a purpose of the invention to afford a construction whereby the carbon sheets are vmore firmly held on the supporting bar, any

slight movement in relationto the wrapper being eiectively prevented by securing the carbon pack through the instrumentality of a folded portion carried by the backing sheet and a supplemental coincident folding portion on the wrapper, thus enabling the use of a thin, lightweight wrapper, materially reducing the thickness and bulk of the pack as a whole, and imparting greater protection to the carbon sheets.

In general, the invention has for its object to afford means for holding the carbon sheets more rrnly in relation to the supporting bar so as to prevent relative movement or play of the carbon sheets in relation to the supporting bar, and to enable reducing lthe thickness of the pack to a minimum by utilizing a wrapper of considerably thinner paper stockthan the backing sheet.

Still another purpose of the invention is to afford a backing sheet that imparts greater protection to the carbon sheets, in conjunction with a lightweight wrapper that has a continuous and unbroken top surface which protects the exposed carbon surface of the outermost carbon sheet while preventing interference between the superposed manifolding record sheet and the carbon pack asembly when the latter is withdrawn with the carbon paper carriage.

More particularly the invention has for its purpose to provide a carbon paper pack in which a multiplicity of carbon paper sheets, each of which is folded outwardly with its carbon surface eX- posed, are attached at one end to a backing sheet of relatively heavy or thick paper while the carbon sheets are protected by a wrapper of relatively light or thin paper that extends over the exposed carbon surface of the outermost carbon sheet, around the side edges of the folded carbon sheets, and thence over the outer face of the heavy backing sheet to which the wrapper is attached, leaving the folded carbon sheets free to be individually unfolded and drawn from the pack, while the backing sheet and a portion of the wrapper vextend rearwardly beyond the carbon sheets in superposed relation and have coinciding folded portions at their rear ends aiording adjacently disposed iiaps which are foldable together around and under the supporting bar of a carbon paper carriage, and when in such attached position, the folded portion of the back# ing sheet being located beneath and adjacent to the supporting bar and the folded portion of the wrapper being located beneath and adjacent to the folded portion of the backing sheet.

A further object of the invention is to obviate likelihood of the wrapper being torn Whenattached around the supporting bar and tension applied, by maintaining the carbon pack on the supporting bar primarily by means of a folded portion provided on the heavier backing sheet, such holding means of the backing sheet being supple-f U mented by a folded portion on a portion of the lightweight wrapper, thus affording a strongr and rigid holding means for the carbon pack while enabling use of a wrapper of thin or lightweight paper without danger of the latter being torn or fractured in use.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear clearly from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims following the specification.

In the drawings:

Fig. 1 is a plan View of a. carbon Peper' pack constructed in accordance with a, preferred embodiment of the invention, and illustrating' it in position on a supporting bar of a carbon paper carriage of a nianifolding typewriter;

Fig. 2 is a rear elevation of the carbon paper pack removed from the supporting bar;

Fig. 3 is a View in elevation of the carbon paper pack, partially broken away, showing the outermost carbon sheet entirely withdrawn from the pack for use and the next carbon sheet in position to be grasped and withdrawn after the first mentioned carbon sheet is used and torn off Fig. 4 is a longitudinal central sectional view partially broken away on line 4 4 of Fig. l looking; in the direction indicated, and

Fig. 5 is a plan view of the wrapper blank before being folded around the carbon sheets and attached to the backing sheet.

The invention is an improvement on the construction shown in application Serial No. 211,353,

filed- February 16, 1951, and referring more particularly to the drawings in which like reference numerals refer to the same parts throughout the several views, the structure herein disclosed which constitutes one practical embodiment of thev invention comprises a series of superposed carbon paper sheets I folded independently of each other and each folded outwardly upon itself with its carbon surface exposed. The several carbon paper sheets folded in this fashion have their ends alined and attached to a paper backing sheet 2, see Fig. 4, which latter has a portion 3 folded around the alined ends of the carbon paper sheets and secured thereto as by a lineof stitching 4, or in any other suitable fashion. The for.-

ward exposed end of each folded carbon paper sheet terminates a short distance from the line of stitching i so that the topmost exposed carbon sheet can be readily grasped at its forward end and withdrawn from its position over the, reserve supply of carbon sheets when it isY to be placed in use.

Inorder to attach the carbon pack removably to a supporting bar or bladel of a carbon paper carriage indicated at 5, the backing sheet 2, which isr formed of substantiallyv thicker and heavier. paper stock than the wrapper to be described presently, is provided with an extension thatprojects rearwardly beyond the carbon sheets and terminates in ay folded portion 5 that is positionable around and under the supporting bar 5 andheld thereon by a metal clip 'I or other suitable/means, as will be described morev fully hereinafter,

In order to protect the exposed carbon coated face of the outermost carbon sheetfrom contact with the ngers of the operator and to hold the reserve supply of folded carbon sheets in proper relation to each other until each is withdrawn from the pack for use, there is provided a wrapper of paper of lighter weight or'thinner than the paper of whichl the backing sheet 4 is made, and

this wrapper surrounds the folded carbon sheets and backing sheet with a continuous unbroken surface extending over the exposed outermost carbon sheet, the wrapper extending thence around the side edges of the carbon sheets and over the bottom face of the backing sheet to which it is adhesively or otherwise attached.

Such. a wrapper is illustrated in Fig. 5 and includes a top portion 8 that overlies the outermost carbon sheet, bottom portions 9 and II that extend around the side edges of the folded carbon sheets and over the bottom face of the backing sheet 2, and an extension l2 that projects from the rear end of the top portion 8 and terminates in a folded portion I3 that is adapted to fold around and under' the supporting bar 5. The foldedv portion I3 of the wrapper coincides with and is preferably coextensive with the folded portion 6 of the backing sheet and when attached to the supporting bar and held in place by clips 'I or other suitable fastening devices, the folded portion 6 of the backing sheet underlies and is in contact with the supporting bar 5 and the folded porti-on I3 of the wrapper underlies and is in contact with the folded portion 6 of the backing sheet, the clips 'i being secured over the respective folded portions 6 and I3 of the backing sheet and wrapper.

In this manner, the folded portion I3 of the wrapper protects the` folded edges of the carbon sheets from contact with portions of the record sheets when the carbon paper carriage. is withdrawn rearwardly of the record sheets and also supplements and assists the folded portion 6 in holding the carbon paper pack firmly on the supporting bar 5 in such amanner as to prevent any slight sidewise movement of the carbon paper pack relatively to the supporting bar. The carbcn paper pack being supported mainly by the folded portion of the somewhat heavier and stiffer backing sheet, there is relatively little strain imposed on the folded portion of the lightweight wrapper and consequently there is little tendency for the wrapper to be torn or fractured in the usual and normal operation of the carbon pack, while the. folded portion of the backing sheet additionally protects the carbon sheets. lTheV folded portions I3 and of the wrapper and backing sheet are preferably independent and freeA from each other but may be adhesively or otherwise secured together if preferred to form a onepiece folded unit.

The wrapper is assembled by placing the top portion 8V in position overlying the exposed carbon surface of the outermost folded carbon sheet, then folding the bottom portions 9 and. II re-v spectively around the edges of the carbon sheets and over the bottom surface of the backing sheet 2. lThe bottom portions 9 and Il overlap partiallyv and are adhesively attached to each other and to the backing sheet preferably along their overlapping edges and throughout the length of the wrapper, as indicated by dotted linesin Fig. following which the extension on the top portion of the wrapper is folded along a line spaced from the rear ends of the folded carbon sheets and coincident with the fold of the backing sheet 2, affording coextensive'folded portions that are together positionable around and beneath the supporting bar 5. of the carbon paper carriage.

When the-folded portions are thus secured to thev supporting bar 5 .by means of metal clips l, as customary in the-use of carbon paper'packs, the folded portions 6.and I3,4 extend over the bot.- tom portions 9 and II of the'wrapper and the bottom surface of the backing sheet 2 preferably to approximately the position indicated in Fig. 2 and in dotted lines in Fig. l. The wrapper is dimensioned so that when attached to the backing sheet 2, as shown in Fig. l, the forward edge of the wrapper terminates a short distance rearwardly o-f the forward edge of the outermost carbon sheet, thus exposing a suiiicient portion of the free edge of the carbon sheet to enable the operator readily to take hold of the sheet and withdraw it from the pack, after which it will be understood that the free edge of the next underlying carbon sheet is exposed for use, as indicated in Fig. 3, after the withdrawn carbon sheet has been used and torn off.

The wrapper surrounding the folded carbon sheets is adhe'sively attached to the backing sheet and ts with sufficient snugness to reduce the thickness and bulkiness of the pack to a minimum and to insure holding the carbon sheets in proper relation to the backing sheet and prevent slight dislodgment of one or more of the carbon sheets, while at the same time the wrapper is so related to the carbon sheets that an operator can grasp the central portion of the forward edge of the outermost carbon sheet and withdraw it readily from the wrapper to the position illustrated in Fig. 3. v

While the invention has been described with reference to the particular construction herein shown, it is not restricted to the exact details disclosed and this application is intended to cover such modifications or departures as may come within the purposes of the improvement and the scope of the following claims.

I claim:

1. A carbon pack for manifolding typewriters comprising a multiplicity of superposed independently and outwardly folded sheets of carbon paper alined at their ends and a backing sheet of thick paper stock to the front end of which said carbon sheets are secured while the opposite end of each carbon sheet is free and has its carbon surface facing outwardly, said backing sheet extending rearwardly beyond the carbon sheets and having a portion at its rear end that is folded outwardly around and under a supporting bar, a wrapper of thin light weight paper stock having a continuous and unbroken front portion extending across the outwardly facing carbon surface of the outer carbon sheet, and rear portions extending around the side edges of the carbon sheets and across the outer surface of the backing sheet and secured to said outer surface of the backing sheet, the forward edge of said front portion of the wrapper terminating in spaced relation behind the forward free edge oi the outermost carbon sheet and exposing the latter to permit gripping and pulling out the exposed carbon sheet without disturbing the wrapper or the underlying carbon sheets, and an extension on the front portion of the wrapper proy jecting rearwardly beyond the folded ends of the carbon sheets and having a portion at its rear end folded inwardly around and beneath said folded portion of the backing sheet and the supporting bar in contiguous relation to the backing sheet when the latter is attached to the supporting bar.

2. A carbon pack for manifolding typewriters comprising a multiplicity of superposed independently and outwardly folded sheets of carbon paper alined at their ends and a backing sheet of thick paper stock to the front end of which said carbon sheets are secured while the opposite end of eachv carbon sheet is free and has its carbon surface facing outwardly, said backing sheet extendingrearwardly beyond the carbon sheets and having a portion at its rear end that is folded outwardly around and under a supporting bar, a Vwrapper of thin light weight paper of substantially thinner and lighter weight than said backing sheet having a continuous and unbroken front portion extending across the outwardly facing carbon surface of the outer carbon sheet, and rear portions extending around the side edges of the carbon sheets and across the outer surface of the backing sheet, said rear portions being secured to each other and to the outer surface of the backing sheet throughout the length of said rear portions, the forward edge of said front portion of the wrapper terminating in spaced relation behind the forward free edge of the outermost carbon sheet and exposing the latter to permit gripping and pulling out the exposed carbon sheet without disturbing the wrapper or the underlying carbon sheets, and an extension on the front portion of the wrapper projecting rearwardly beyond the folded ends of the carbon sheets and having a portion at its rear end folded inwardly around and under said folded portion of the backing sheet and the supporting bar in contiguous relation to the backing sheet when the latter is attached to a supporting bar.

3. A carbon pack for manifolding typewriters comprising a multiplicity of superposed independently and outwardly folded sheets of carbon paper alined at their ends and a backing sheet of thick paper stock to the front end of which said carbon sheets are secured while the opposite end of each carbon sheet is free and has its carbon surface facing outwardly, a wrapper of thin light weight paper of substantially thinner and lighter weight than said backing sheet having a continuous and unbroken front portion extending across the outer carbon sheet, said wrapper having rear portions extending around the side edges of the carbon sheets, across the outer surface of the backing sheet and secured to said outer surface of the backing sheet, the forward edge of said front portion of the wrapper terminating in spaced relation behind the forward free edge of the outermost carbon sheet and exposing the latter to permit gripping and pulling out the exposed carbon sheet without disturbing the wrapper or the underlying carbon sheets, the front portion of the wrapper and the backing sheet extending rearwardly in superposed relation beyond the carbon sheets and having contiguous portions that are folded together around and under a supporting bar with the backing sheet against the supporting bar and the folded portion of the wrapper against the extension of the backing sheet, the folded portions of the wrapper and backing sheet extending forwardly to points slightly beyond the adjacent edge of the wrapper.

JOSEPH CARROLL DOYLE.

References Cited in the file of this patent UNITED STATES PATENTS Number 

